It is sad that nutritionists could be so ignorant.  The fact that all
nutritionists in a particular area are all ignorant does not add up to
a greater sum of enlightenment.  How could an place with so much sun
have so many benighted nutritionists?

I used to have a ton of articles on the *lack* of need of extra water
for breastfed babies.  These articles were done in many places,
(Jamaica, Peru and others), including places *hotter* than Puerto Rico
(Ivory Coast), and showed that extra water was not necessary.
Unfortunately, I have thrown them out in a mania of downsizing the
files, thinking, "this problem has been settled; no need for these
anymore".  I am sure you will get many references.

Jack